210nm - well in my day, although people did fly at 21,500 lb, I was one of those that insisted on sticking to the (then) certified MGOW of 20,500 lb. Didn't make many friends from the "George Medal or bust" brigade but I figure that as the component lives were based on that number then, somewhere down the line, there might be some young lad with a family who would be grateful that at least some members of my generation showed some respect for the machinery and didn't tear the arse out of it in vain search of glory. When you get to 3000 feet and find your Vne is 75kts because it shakes so much at 21,500lb then I'm glad nobody can pin that kind of crap on me.
If you take an hour or so's fuel off the 250nm target then you get 150nm -
Quad - as they say -
est demonstratum
G